"Enlightenment is one of the oldest open source desktop projects in existence. With E17, the developers are gearing up to their latest release, an occasion that has been a long time in the making. The word is that the team will make some announcements at the EFL Developer Day taking place as part of Linuxcon Europe on 5 November. With a release likely being close at hand, The H spoke to project leader Carsten 'Rasterman' Haitzler about how the desktop environment has been progressing and what the goals are for the project."

You search up E17, wander around for a while, maybe find an image or two on Google Images or the Wikipedia page, don't find a solid explanation of why this thing named E17 is more interesting than KDE 4 or GNOME 3 or some other pretty desktop, and run out your curiosity inertia before you start properly investigating the See Also links.